How to make "Update Check" to use a Web proxy?

Would the following do it?

Add a virtual server with a spare IP address and wildcard port. Add host entries on the F5 with the update server's names pointing to the spare address, this will override DNS and send the traffic to your virtual server. Set your pool members on the new virtual server as the proxy addresses.

This should send the update traffic to the virtual server which will in turn throw this at the proxy. Thereafter its up to the proxy to resolve the requested website name using normal DNS.

Just an idea.

Merry Xmas!